Des Moines International Airport (IATA: DSM, ICAO: KDSM, FAALID: DSM) is a civil-military public airport three miles southwest of Des Moines, in Polk County, Iowa. It has 19 connections to major airline hubs.

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During the 1920s the Des Moines area had several small private airports for general aviation and airmail. In 1929, the Iowa General Assembly passed a law allowing cities to sell bonds and levy assessments in order to build municipal airports. Over 80 sites were considered for the Des Moines Airport until a decision was made to build on 160 acres (0.65 km²) of farmland south of the city. Construction of the airport began in 1932 and was completed in 1933. The airport's first passenger terminal was built shortly after the airport was completed. It was replaced by a new terminal in 1950 that has been expanded and renovated several times since then. The present concourses were built in 1970, along with the remodeling of the terminal.[4] The airport itself has expanded several times from its original 160-acre (0.65 km2) site and now covers 2,300 acres (9.3 km²) of land.

The airport was originally governed by the City of Des Moines' Parks Department. A separate Aviation Department was established by the city during the 1960s, and in 1982, a separate Aviation Policy Advisory Board was established. The airport was renamed the Des Moines International Airport in 1986 to acknowledge the presence of a United States Customs Service office at the airport.

In 2011, the City of Des Moines transferred control from the city to the Des Moines Airport Authority. The city retains ownership of the land but transfers title to all property and equipment to the public authority. In turn, the authority agreed to a 99-year lease on the land.[5]

Interior renovation work began in 2009 on the airport and concluded in 2010. The project, designed by Brooks Borg Skiles AE LLP,[10] includes new carpets, paint, gate counters, seating, a new ceiling, signage, and a fire sprinkler system. Also included in the upgrade is a common-use project allowing any airline to use any gate at the airport. A new restroom is also being added to the C concourse to allow for future concourse expansion. The airport is modernizing baggage handling capabilities with expanded processing facilities as well.

In addition to work inside the passenger terminal, the airport is building a rental car facility and new parking facilities. It is also planning a new 5,000-foot runway (to be extended to 9,000 feet (2,700 m) in a later phase), and a new GA apron. The new GA apron is partially in response to the failure of a reliever proposal in Adel, Iowa and restricted space in the current GA area.

On December 2, 1978, Douglas C-47A N41447 of SMB Stage Line crashed short of the runway while on a cargo flight from Chicago, Illinois.[15] Airframe icing was a factor in the accident.[16]

On December 1, 2007, a United Express plane carrying 44 passengers slid off a taxiway while taxiing to the runway for takeoff. No one was injured, but the airport was closed for seven hours after the incident because of the winter storm moving through the area.[citation needed]

On March 13, 2008, an Atlanta-bound ASA (Delta 4704) flight was delayed more than five hours when a mouse was discovered shortly before take-off from DSM. Officials delayed the flight to inspect the plane for any damage that the mouse may have caused. Maintenance crews checked wiring and components on the aircraft. The flight took off at 11:39am.[17]

On December 18, 2010, a small red Beechcraft Bonanza crashed while performing an emergency landing at DSM. The Airport Director stated that the small craft had engine problems and turned around for the airport. The aircraft eventually lost the engine and pilot was able to glide to the end of the runway. The aircraft clipped the end of the runway fence with its landing gear, making the nose of the craft dip into the snow. Police and emergency reported only minor injuries.[18]